Year	Number of
1990	731.79
1991	729.05
1992	723.75
1993	712.16
1994	707.7
1995	697.75
1996	718.69
1997	730.72
1998	743.83
1999	759.76
2000	773.18
2001	762.39
2002	766.71
2003	781.55
2004	799.78
2005	829.43
2006	843.38
2007	857.97
2008	879.33
2009	885.26
2010	899.36
2011	923.09
2012	933.72
2013	938.36
2014	938.15
2015	933.11
2016	936.26